Canada - 10 cents ; 1967 [επιλυμένο]

Can an additional year line be added to the entry below, the comment suggests mintages for both .800 and .500 silver but only 1 date line exists for the circulation versions with a conflicting comment.

https://en.numista.com/catalogue/pieces384.html

Also the use of we and you in these conflicting statements feels kinda odd for a catalog:

This mintage includes .800 and .500 as we can’t tell one from the other
You can tell the 2 apart from the weight the 80% is heavier (2.33 grams) than the 50% (2.18)

If the page for the .500 version doesn't already exist one should be made and the right weight added of course with cross-linkage.
Personally I also don't know why there are all these different denominations in the see-also box, you can group events or series in there respective fields and use the see-also for coins that could be mistaken for this one (I thought this was the intended purpose).

Yes, I suppose technically a separate entry for the .500 should be made. I'll wait for the Canadian referee to see this post before creating one. Also, the see also looks like they are related as part of a set, as you say that can use the series field for that. There are quite a few inconsistencies in the Canadian coins, especially with duplication in fields for obverse and reverse not using the lettering fields correctly.

An additional year line is NOT correct. The metal content is different (.500 and .800 silver) which means these are different types: KM# 67 and KM# 67a. So in stead of a new year line, we need a new coin sheet.

And yes, as Idolenz says, the comments sound odd:

This mintage includes .800 and .500 as we can’t tell one from the other

This is not correct. Of course "we" can tell one from the other. It will not be easy and most of us can't do it ourselves. But XRF devices can tell the difference without any doubt. Your local coin shop normally has such a device.

You can tell the 2 apart from the weight the 80% is heavier (2.33 grams) than the 50% (2.18)

I doubt if you can use the difference in weight to determine the silver content. First of all, in Krause both types have the same weight (2.33 g), and secondly, suppose Krause is wrong and the 50 % weighs 2.18 g., every coin is struck within a tolerance of several %s. The difference in weight (if there is one!) is just too little to make a determination with certainty.
Mine is 2.32 g. so that should be a 80 %. I'll take it to the XRF device next time and when it turns out I have a 50 % you can say with certainty determination by weight isn't possible.

Though I've heard the weight to be an accurate way to tell the coins apart in UNC, any wear at all and it becomes impossible to use it as the determining factor.
And though I don't like seeing new catalogue pages pop up for every variety, and it would seem so much simpler to simply add a year-line, I agree that this piece may need a new sheet due to present Numista structuring.

In the case of a different metal a new page should always be made but I don't envy you with all these commemoratives and the countless special issues and finishes in your jurisdiction.