Key point is ALWAYS make sure you never, ever pay late and always pay at least the minimum due.
Beyond that, it's non critical. High utilization rates are self healing with no memory. They disappear the very next month if all is in-line. I really can't, with any certainty, tell you cause and effect for your example. Best I can offer is not to get worked up over it because it has no long term implications..
If you only have the one card, $511 out of $1800 is above 20% for aggregate utilization and that is WAY higher than the near zero % you had before. A stab in the back of 20 or 30 points would not be unheard of. Regardless, no worries - as the man said "pay it off" no lingering effect.
Fico 9: .......EQ 850 TU 850 EX 850
Fico 8: .......EQ 850 TU 850 EX 850
Fico 4 .....:. EQ 809 TU 823 EX 830 EX Fico 98: 842
Fico 8 BC:. EQ 892 TU 900 EX 900
Fico 8 AU:. EQ 887 TU 897 EX 899
Fico 4 BC:. EQ 826 TU 858, EX Fico 98 BC: 870
Fico 4 AU:. EQ 831 TU 872, EX Fico 98 AU: 861
VS 3.0:...... EQ 835 TU 835 EX 835
CBIS: ........EQ LN Auto 940 EQ LN Home 870 TU Auto 902 TU Home 950
