Scott A10 11A 3c Washington Double Or Triple Impression - Feedback Requested

Hi everyone - I am a new/old stamp collector that has purchased a large amount of US classics as of late. When going through some of them, I came across this stamp. I haven't been able to see any pictures of a "double impression" for the Scott A10 stamp - I think this one is a 11A. What caught my eye is the left side has what appears to be 3 impressions. My photography skills stink so I took a couple pics and did a 600 dpi scan. I have a bunch of stuff I'll be sending for grading/verification soon - is this something of note or is this common? New to the forum here, I do plan to be a frequent participant and appreciate any and all guidance!

It's not a double or triple impression, it is one of the extra frame line varieties.

It looks to be position 89L3. (two extra frame lines at left and right inner frame line replaces right inner line)

2019 catalog value: $32.50

Two positions on Plate 3 have these extra framelines (Variety 6 as noted in the following: https://lcps-stamps.org/wp-content/...Revised.pdf), so not common by any means but well-known.

Thanks so much for the replies! I used to collect coins and the 55 double die was my unicorn, the fact that the right was not multiples was confusing. Appreciate the links and will be reading up on these :)