I am always only paid 1/2 of my regular rate for overtime. Is this right?

It may be that your employer is paying time and a half for overtime hours but breaking down the payment in a different way. In some payroll systems, all hours, including overtime hours, will be paid at the regular rate in the one calculation. Then in a second calculation, the additional 1/2 time that is due on the overtime hours (the straight time pay for the overtime hours was included in the first calculation), will be shown separately. This results in the overtime hours being paid at time and a half – just broken down as 2 calculations, regular time and 1/2 time.

For example:
Hourly wage = $9.00. Total weekly hours: 50.
Paystub may show the following:
Regular Pay = 50 hours x $9.00 = $450.00
Overtime Pay = 10 hours x $4.50 ($9 x 1/2) = $45.00
Total Pay = $495.00

Since the 10 hours of overtime was included in the first calculation at $9.00/hour (straight time), the remaining overtime pay due is 1/2 time pay.

Alternatively, pay could have been calculated as:
Regular Pay = 40 hours x $9.00 = $360.00
Overtime Pay = 10 hours x $13.50 ($9 x 1.5) = $135
Total Pay = $495.00