Whatever the cause, it does appear by your description that the razor is dull (tugging). This could be due to the incident you mention or it could be poor stropping in general.

When you say 60+40 are you meaning 60 canvas 40 leather? If so, I'd reverse that, i.e. 40 canvas 60 leather. I do 30/70 each and every time I shave with 10/10 after. As said above, another solution is a high grit hone or paste. Of course, another solution is to send it out for honing.

If you DO decide on honing, go very light and use only a few strokes. Depending on the hone you may need only 10 to 20; I can refresh very successfully on my 16k Shapton with ten laps. Also, try and find out if the razor was honed with or without tape. At this stage you may wish to copy that (i.e. if it was honed with tape use tape, if without use no tape). Later on, you may decide to re-set the bevel if you want to differ (i.e. use tape where none was used or vice versa).

The dark spots near the edge are probably water stains. Ensure you dry the razor very well and ensure you apply something to protect the edge, I use pure Eucalyptus oil. The 10/10 stropping post shave also cleans and dries the edge. Ensure you store the razor away from moisture, I store mine in two three-razor leather cases on the desk in my bedroom; sometimes a bathroom is the worst place to store a razor (wet and humid).

Carl