I'm sorry I not really speak Russian, you can use the Google Translator. I´m a member of L1280 and realy intimate with it.
1. for the results for sham ( IN36351). Your results will turn out definitely as FGC11555, but your markers don´t support a relationship to grimsvotn, you are positiv for 2 of 11 STR markers that belong to YP4850, but this is a very young clade orginated in Germany Rhineland Palatina, also some markers are the same for the Italian sample (FTDNA:78351) so you both are maby positiv for 1 or 2 of the 14 SNP´s that define YP4850. You share also some rare markers with the NGS tested sample (FTDNA:B1578/YFull:YF01517) from the Czec Republic which are negativ for all SNP´s under YP4850, so it is possible that you share a until now unknown new subclade under FGC1555, only a Y500 or an other NGS test will help you to find out more, to test all the singel SNP´s would be much to expensiv.
2. for Global Verona, the problem with your results is that the most markers that are typical for L1280 are not tested, also many markers that define the 3 known subclades are not tested. But I think what I´ve seen that you will more likely turn out negativ for FGC11155, FGC19283 and YP5647. There are about 15 samples under L1280 that are most likely negativ for the 3 subclades (only 1 is tested negativ for all 3 FTDNA: B112672 from France) the most of the rest are from Russia, we´re waiting for 2 person that will test with Y500 or an other NGS test to find a potential new sublade under L1280, but to be more sure if you are realy negativ for the 3 subclades you can test some more STR markers, for FGC19283 you can test: DYS520 and DYS552, for FGC there are 20 different markers you´ve tested for 4 of this, for the subclade grimsvotn belongs too, you are tested 2 of the 4 markers, one you share with him DYS458=14, only the 3 peaple of this subcluster under FGC11555 and 1 unclusterd sample show this marker. For YP5647 is a subclade: YP6343 with 1 member from Russia and 4 members from the Balkan you are positiv for one marker YGATAH4=13, but negativ for one other, for YP611 you are negativ for all markers you´ve tested. I personal think the best option is the Y500 or an other NGS test, if you can´t effort it try to test the SNP´s L1280, FGC11555, FGC19283 and YP5647 for example with YSEQ the cheapest company for testing singel SNP´s I know.
Best Florian