I have replaced 10 tires with only 58K miles on my vehicle. What is going on?

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I have replaced 2 1/2 sets of tires. The last full set of tires lasted only 19K miles and the ones before that were much better. I was just told my front struts were shot but why did that cause my tires to all wear on the inside, causing the belts to be exposed. What caused the problem before when I had to replace all 4 tires. Replaced two tires on 4/25/09 Mileage 24,688 Replaced four tires on 1/26/11, mileage 38,831 Replaced four tires on 5/1/13, mileage 57,371 What does comment Bolt pattern 5-108 mean? That was on the last two full tire replacements.