Pasted Linen?

Ok, so I overhoned my 6/8 straight razor. It all started off when I gradually noticed that the edge wasn't quite as sharp as it used to be and was pulling more and more each day than I preferred. So I decided to strop it on the linen side of my Russian leather strop. I gave it about 50 passes or so. And when I shaved with it again, it REALLY pulled this time. I looked at the edge when I was through, didn't see a wire edge, but when I did a thumbnail test to make sure, it had that gritty kind of feeling. I suspect that the strop's been pasted with lime or chalk.
I've only used soap on the linen strop, but I understand that it's considered to be mildly abrasive, but what exactly is the grit of chalk? I usually do 20 passes on linen and about that much afterwards.
And, would it be better if I just stropped with the linen side say, every two days?
Thanks for the help guys

The overhoned edge on The Thumbnail Test usually glides effortlessly like an ice skate on ice. If you're feeling grit and drag, then it's a sign that the edge is under done. The 'abrasiveness' of the linen is not the same as a honing stone or paste and shouldn't be sharpening unless there's chalk there or something like you say. I normally do about 12 laps before each shave on the linen.

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